Hi Doctor.I'm Sunny,few Months Back I Met With A Small

Hi Doctor.I'm Sunny,few months back I met with a small accident,I fell down from bike.Suddenly I wake up from the road I felt too much of pain in my right knee but there are no external injuries noted on my knee.Then that evening after waking up from a small sleep i had my knee swollen,immediately i went to a hospital to consult a doctor[M.B.B.S] because of my some external injuries on other body parts.He gave me some injections,I felt better then but after some months I felt my leg paining irrespective of any stress applied on the legs. There is no swell during the pain. I didn't consult a doctor[ORTHOPAEDIC].i'm planning to consult a doctor.May i know is there cure to my pain and what are things i have to ask a doctor when i consult him.
Please clarify my doubt:My mother and some friends are saying that those pains cannot be cured and it will continue till death.Is it correct?Awaiting for your reply.